Fix pow overflow in non-default rounding modes (bug 16315)

[Stefan Liebler]

Hi Joseph,

you´re patch 
https://www.sourceware.org/ml/libc-alpha/2014-06/msg00904.html fixes the 
lpow issues on s390/s390x.

Thanks

On 06/26/2014 03:36 PM, Joseph S. Myers wrote:
> On Thu, 26 Jun 2014, Stefan Liebler wrote:
>
>> Hi Joseph,
>>
>> on S390 test-ldouble/test-ildoubl fails after testing in all rounding modes.
>> (see out-file; the expm1l failures does not belong to this patch)
>> But I haven't debugged it yet.
>
> Well, this patch didn't touch ldbl-128/e_powl.c, so I think this indicates
> pre-existing bugs that the newly enabled tests show up (including cases
> where even the sign of the result is wrong).
>